Extension updates range from major to minor. The major effort was to make all Biomass extensions cross-compatible with Biomass, PnET, and NECN succession extensions. Other updates including adding the Metadata Library to most extensions, allowing their use with the LANDVIZ tool: https://sites.google.com/site/landismodel/tools/viz-tool

The Core was also updated to 6.2.1, although this is a very cosmetic upgrade, changing some of the error messages to be more intuitive.

We instituted a rigorous QAQC process for each. However, as with all software, there's no doubt that some bugs remain. Please let me know what you find.

Finally, we recommend a clean install if you are going to update. Uninstall the model from Program Files -> LANDIS-II -> Uninstall. Next delete the entire LANDIS-II directory from the Program Files directory.